Screwed-pipe union.



No. 798,078. PATENTED AUG. 29, 1905 J. SIMPSON.

SCREWED PIPE UNION. uruoumn nun BEPT.11,1903.

IINVENTOR Wa-rNELssas UNITED STATES PATENT OFFICE.

JOHN SIMPSON, OF SYDNEY, NEW SOUTH WALES, AUSTRALIA.

SCREWED-PIPE UNION.

Specification of Letters Patent.

Patented Aug. 29, 1905.

To (LZZ whom it may concern.-

Be it known that I, JOHN SIMPSON, works manager, a subject of the Kingof Great Britain and Ireland, residing in the city of Sydney, in theState of New South Wales, Australia, have invented a new and usefulImproved Screwed-Pipe Union, of which the following is a specification.

My invention relates to unions for connecting screwed pipes; and itrelates also to unions for connecting pipes, cocks, valves, and otherfittings to pipes and fittings of larger gage and to elbows and otherparts having bends orlarge bases. Its object is to obtainaperfectmechanical screwed union-coupling of cheap and simple construction andto dispense with soldered joints, which sometimes cause trouble as aresult of corrosion and galvanic action.

My invention is of value where two parts are to be connectedwhosedimensions or design are such that a union nut cannot be brought upbehind a shoulder in the usual way. It meets this difiiculty byproviding an insertible shoulder-ring in the shape of a spring-piece,which is sprung home into a recess on the piece carrying the nut afterthe nut has been put on same, the design of the parts being such thatthe pressure of the nut holds the ring into its seating and prevents anymovement thereof.

Referring to the annexed drawings, Figure 1 is a longitudinal sectionthrough my coupling; Fig. 2, an end view of same; Fig. 3, a plan of theinsertible split-ring collar; Fig. I, a side elevation of same, and Fig.5 a section through same.

The union consists of a union-nut H, tapped at h to take the thread onone of the pipes, and a coupling-collar K, tapped at Z. to take onto thethread on the other pipe to be coupled. The bored portion of the part Kcorresponds in bore with the pipes to be connected. A gasket may beinserted against the end of the coupling K, covered by the unionnut, soas to make a close joint between the same and the end of the pipe onwhich the union-nut H screws.

Rearward of the neck L of the part K a groove M is turned, and into thisgroove M the split collar N is fitted. The inner face of groove M isinclined to the axis of the pipe K. The collar is formed as a ring and ascarf cut is put in it, as indicated in Fig. 4.

This cut'allows of the collar being sprung open suificiently to enableit to be worked into the cavity O in the body of the union-nut H. Afterit has been worked into its place in this cavity the coupling-piece K isdriven in so as to force the shoulder P past it, which done it will snapinto the recess M. The two parts K and H are thus locked together. Theouter side of the ring N takes its bearing against the conical edge ofthe ring Q of the nut H in order that when the nut H is screwed home thepressure put upon the ring N, which now forms a shoulder on thecoupling-piece K, bringing the two pipe lengths together, that pressurewill also tend to-compress the ring N into the recess M and hold it assecurely therein as if it were an integral part of the coupling-piece K.The outer surface of the coupling-piece K rearward of the recess M isturned cylindrically to enable the nutH to be dropped back, so that itsforward end may be brought face to face with the pipe end on which thenut is to be screwed.

In operation the coupling-piece K having been locked into the nut H byfirst inserting the ring N and then driving home the. coupling-piece Kuntil the ring N springs into its recess M, the part K is screwed ontoone of the pipe ends. Then the coupling is brought in line with theother pipe end to be connected, and the nut H is advanced out andscrewed home on such other pipe end to make the joints, for bettersecurity, if necessary, a gasket being inserted where the pipe and thecoupling butt.

What I claim as my invention, and desire to secure by Letters Patent,is-

A sleeve-union for coupling screwed pipes consisting of a sleeve havingan angular recess therein, the inner face of said recess being inclinedto the axis of the sleeve, a nut on the sleeve having a flange having aninclined face and an inserted split ring triangular in section set inthe angular recess in the sleeve and adapted externally to the inclinedflange of the nut, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN SIMPSON.

Witnesses! L. LUCAS, W. J DAvIs.

